Light and thin circular knitting machine knitted fabric with moisture absorption and quick-dry composite functions and weaving, dyeing and finishing process of light and thin circular knitting machine knitted fabric

Abstract

The invention discloses a circular knitting machine knitted fabric with moisture-absorbing and quick-drying composite functions and a preparation method thereof, and is characterized in that the fabric takes three-component blended yarns prepared from wool fibers, modal fibers and modified polyester supercool (10-15%: 10-15%: 70-75%) through a siro compact spinning process as surface yarns, and modified polyester supercool multifilaments as ground yarns, a blank fabric is prepared from a warp and weft plain plaiting weave structure, and then the blank fabric is prepared into a smooth blank fabric through dyeing and finishing processes such as two-bath dyeing, overfeeding setting and decating. The fabric has multiple excellent functions of moisture absorption, quick drying, bacteria resistance and bacteriostasis and ultraviolet prevention, is light, thin and soft, has no scratchiness, has wool fiber texture and luxurious luster on the surface, is good in air permeability and is suitable for knitting T-shirts and POLO shirts in spring and summer.

Description

Technical Field

[0001] The invention relates to the technical field of knitted fabrics, and in particular to a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function and a weaving, dyeing and finishing process thereof. The circular knitted fabric and the weaving, dyeing and finishing process thereof not only have excellent moisture absorption and quick-drying functions, but also have excellent antibacterial and antimicrobial / ultraviolet protection composite functions. The circular knitted fabric of the invention comprises wool fibers, and the invention is particularly suitable for knitting T-shirts and short-sleeved (POLO) shirts in spring and summer. Background Art

[0002] In spring and summer, POLO shirts, T-shirts and other knitted garments that are worn close to the skin must not only be soft to the touch, wick away moisture, conduct moisture quickly and dry quickly, and be breathable and breathable, but also have multiple composite functions such as antibacterial, antimicrobial, and UV protection, which will be very popular among consumers in the market.

[0003] Existing knitted clothing fabrics such as POLO shirts and T-shirts with multiple composite functions such as moisture absorption and perspiration, antibacterial and anti-bacterial, and UV protection are generally directly made of modified polyester fibers with special cross-sections and functional polyester fibers with added antibacterial, UV protection and other functional masterbatches, or the functional polyester fibers are blended with natural fibers such as cotton and viscose with good moisture absorption, and are prepared through double-layer, triple-layer or integrated knitted structure design.

[0004] Or the knitted clothing fabrics such as POLO shirts and T-shirts are prepared by performing functional finishing on cotton knitted yarn or knitted fabrics such as moisture conduction and quick drying, moisture absorption and perspiration removal, antibacterial and bacteriostatic, and UV protection. However, the functionally finished fabrics not only affect the soft touch, but also reduce or lose their functions after repeated washing.

[0005] In addition, the official moisture regain of wool fiber is 15-17%, and the maximum moisture absorption rate can reach 40%. It is the fiber with the best elastic recovery among natural fibers. It has the characteristics of good moisture absorption, good elasticity, and good thermal insulation. Therefore, wool fiber knitted products are soft and comfortable, moisture-absorbent and breathable, elastic and warm, with a light luxury and soft luster. They are widely used in autumn, winter and spring clothing products. Clothing products containing wool fibers are also one of the high-end clothing products.

[0006] Utility model patent ZL201120087509.6 discloses a knitted fabric with multiple functions of warmth preservation, moisture absorption, perspiration elimination and antibacterial, including an outer layer, an intermediate layer and an inner layer, wherein the outer layer and the inner layer are connected by the intermediate layer through a double-sided knitted structure; the outer layer is a double-coil structure interwoven by hydrophilic yarn and elastic yarn; the inner layer is a double-coil structure interwoven by moisture-conducting yarn containing antibacterial substances and elastic yarn; the intermediate layer is elastic yarn with moisture-conducting function. The utility model has multiple functions of warmth preservation, moisture absorption, perspiration elimination and antibacterial, and the fabric has good overall elasticity, and has the characteristics of smooth appearance, thickness, soft touch, etc.

[0007] However, the above utility model is a double-sided weft knitted fabric made of wool yarn, modified polyester filament and elastic yarn, which is relatively thick and has the functions of warmth preservation, moisture absorption and perspiration removal (i.e. moisture conduction function, but no quick drying function), antibacterial and bacteriostatic, so it is only suitable for autumn and winter clothing. In addition, the functionally finished fabric not only affects the soft touch, but also has a reduced or lost function after repeated washing.

[0008] As knitted fabrics for spring and summer wool-containing POLO shirts, T-shirts and other close-fitting garments, the prior art generally uses wool yarn and cationic modified polyester fiber interwoven, combined with moisture absorption and perspiration finishing process, so that the product has good moisture absorption and certain quick-drying function. However, the moisture absorption and quick-drying functions of wool fiber fabrics and their production methods are limited (refer to GB / T21655.1-2008 national standard), and lack antibacterial, antibacterial, UV protection and other composite functions.

[0009] For example, the document "Development of wool and polyester interwoven moisture-conducting quick-drying knitted fabrics, Knitting Industry, 2019 (1)" discloses a double-sided fabric made of mercerized shrink-proof wool yarn and cationic modified polyester, interwoven in warp and weft, which has good moisture absorption and quick-drying functions. Its moisture absorption and quick-drying functions are represented by two indicators: the water absorption speed tested with reference to the AATCC standard is 1s (the standard requires ≤1s), indicating hygroscopicity, and the evaporation rate tested with reference to the national standard (0.30g / h, the standard requires ≥0.18g / h), indicating that its quick-drying function is better. In addition, referring to the national standard, hygroscopicity should include three indicators: water absorption rate, wicking height and drip diffusion time, but the most difficult to meet the standard is water absorption rate; quick-drying has two indicators: evaporation rate and moisture permeability.

[0010] According to the invention, a light and thin circular knitted fabric containing wool with a moisture absorption and quick-drying composite function and its weaving, dyeing and finishing process, the circular knitted fabric has excellent moisture absorption and quick-drying functions, as well as excellent antibacterial, antibacterial and anti-ultraviolet composite functions. The multiple composite functions of the invention are obtained through the optimization of fiber materials, blending and interweaving of multi-component yarns, without adding any metal ions to the fiber materials to obtain antibacterial and antibacterial functions, and without any functional finishing to obtain good moisture absorption, quick drying, antibacterial, antibacterial and anti-ultraviolet composite functions. Compared with similar technologies in the past, the circular knitted fabric of the invention and its weaving, dyeing and finishing process are particularly suitable for making knitted T-shirts and short-sleeved (POLO) shirts in spring and summer.

[0011] So far, there is no previous document that provides a wool-containing circular knitted thin fabric with excellent moisture absorption, quick drying, antibacterial and UV protection functions and its weaving, dyeing and finishing process. Summary of the invention

[0012] In order to overcome the above-mentioned defects, the purpose of the present invention is to provide a wool-containing circular knitted fabric with a moisture absorption and quick-drying composite function and a weaving, dyeing and finishing process thereof. The circular knitted fabric has excellent moisture absorption and quick-drying functions as well as excellent antibacterial and anti-ultraviolet composite functions. The circular knitted fabric and the weaving, dyeing and finishing process thereof of the present invention are particularly suitable for making knitted T-shirts and short-sleeved (POLO) shirts in spring and summer.

[0013] The purpose of the present invention is also to provide a circular knitted fabric with the composite functions of moisture absorption and quick drying, antibacterial and bacteriostatic, and UV protection, and its weaving, dyeing and finishing process. The circular knitted fabric has excellent moisture absorption, quick drying, antibacterial and bacteriostatic, and UV protection. At the same time, the fabric is light, soft, and breathable, retaining the luxurious and soft luster of wool fibers.

[0014] Therefore, the multiple composite functions of the present invention are obtained by optimizing the fiber material, blending and interweaving the multi-component yarns, and the fiber material does not add any metal ions to obtain the antibacterial and antibacterial functions, and can obtain good hygroscopicity, quick-drying, antibacterial and anti-ultraviolet composite functions without any functional finishing. Compared with previous similar technologies, the present invention has the unique advantages of light and thin fabrics, soft hand feel, and long-lasting composite functions.

[0015] In order to achieve the above object, the technical solution of the present invention is as follows:

[0016] A light and thin circular knitted fabric with moisture absorption and quick-drying composite function, characterized by:

[0017] The knitted fabric is a double-sided structure formed by double-layer interweaving of single-sided plain weft plating yarn tissue, including:

[0018] Three-component blended yarn for knitted fabric veils,

[0019] Modified polyester supercool multifilament for knitted fabric ground yarn,

[0020] The three-component blended yarn is formed by blending modified polyester supercool short fiber with wool fiber and modal fiber at a mass ratio of 70-75%, 10-15% and 10-15% respectively through a siro compact spinning process, and the three-component blended yarn is interwoven with modified polyester supercool multifilament through single-sided double-layer knitting;

[0021] The modified polyester supercool staple fiber is blended with wool and modal to form a three-component blended yarn with a fineness of 32S; the modified polyester supercool filament is 75D / 72F fine denier multifilament.

[0022] The modal fiber was developed by Lenzing, Austria, and is an upgraded version of high wet modulus viscose fiber. Its dry strength is close to that of polyester, and its wet strength is better than that of ordinary viscose fiber, thereby improving the low strength and low modulus of viscose fiber in wet state. For example, the wet modulus of modal fiber is high, and the shrinkage rate of yarn is only about 1%, while the shrinkage rate of ordinary viscose fiber is as high as 6.5%. In addition, the hygroscopicity and air permeability of modal fiber are 50% higher than those of cotton fiber.

[0023] According to the present invention, it is characterized in that:

[0024] The circular knitted fabric has a grammage per square meter of 165 g / m 2 -220g / m 2 .

[0025] According to the present invention, it is characterized in that:

[0026] The modified polyester supercool staple fiber and modified polyester supercool filament fiber are both grafted with hydrophilic groups on the polyethylene terephthalate polymer chain. The modified polyester supercool fiber adopts a Y-shaped cross-section, and multiple micropores and microgrooves are formed on the fiber surface to form a wicking channel structure of varying sizes.

[0027] Therefore, the specific surface area of ​​Supercool fiber is increased by more than 100% compared with ordinary polyester fiber, thereby increasing the moisture absorption surface and moisture conduction surface, and accelerating the evaporation of sweat.

[0028] Since the face yarn is a blended yarn and the ground yarn is a filament in the added yarn structure, according to the present invention, the blended yarn can be twisted in the direction of conventional knitting yarn (generally Z twist), and the face yarn, if all of them are short-fiber yarns, can be configured with reverse twist (i.e., one Z twist and one S twist), without controlling the twist direction. The 75D / 72F supercool multifilament S twist of the ground yarn in the added yarn structure is a weak twist. Reverse twist can make the fabric coils stand vertically, with clear fabric texture, stable structure, and no skew in the coils.

[0029] As a result, it has excellent moisture absorption, moisture conduction and quick-drying properties. When the fiber accounts for a certain mass ratio (more than 70%) in the fabric, the functional requirements of moisture absorption, perspiration and quick drying can be achieved without the need for auxiliary finishing.

[0030] In addition, because the grafted hydrophilic groups have good antibacterial properties, and the fiber has excellent moisture absorption and quick-drying properties, a dry environment is created where bacteria are not easy to reproduce, giving the Supercool fabric a certain antibacterial effect. The fiber does not contain any heavy metals such as silver, and its moisture absorption, quick-drying, antibacterial and antibacterial functions are long-lasting.

[0031] According to the present invention, preferably, the modified polyester supercool staple fiber is a modified polyester supercool staple fiber with a fineness of 1.2 dtex and a length of 38 mm.

[0032] According to the present invention, the wool fiber of the three-component blended yarn is merino wool fiber with a quality count of 17.5 microns (90N) or above.

[0033] Note: The higher the count, the finer the fiber, the softer the touch, but the higher the price. Currently, 100% wool products that are worn close to the skin generally use 90N. Usually, people will not feel itchy when touching the skin. Of course, the higher the count, the more expensive it is. Since the proportion of wool in this patented product is small, the lower limit of the count (90N) can be used.

[0034] According to the present invention, it is characterized in that

[0035] Modal fiber has a fineness of 0.89dtex to 1.67dtex, a length of 38mm, and a shrinkage rate of 1%.

[0036] According to the present invention, the modified polyester supercool fiber of the present invention is blended with wool fiber and modal fiber in a ratio of 70-75:10-15:10-15, preferably in a ratio of 75:10:15 to form a three-component blended yarn, and the three-component blended yarn is then interwoven with the modified polyester supercool multifilament. The modified polyester supercool fiber accounts for more than 70% of the blank fabric, so that the fabric itself has good moisture absorption, quick drying and antibacterial and antibacterial functions.

[0037] According to the present invention, it is characterized in that

[0038] The rough fabric has a yarn mass ratio of 69.5-70% to 29.5-30.5% for the face yarn and the ground yarn, and a coil length of 15.5-16.0 cm / 50 stitches to 14.8-15.3 cm / 50 stitches for the face yarn and the ground yarn.

[0039] According to the present invention, it is characterized in that

[0040] Single-sided weft plating weave refers to a weave in which part or all of the loops of the weft knitted fabric are formed by two or more yarns. This weave is usually woven with two yarns. When two yarns with different twist directions are used for weft knitting, the skewness of the weft knitted fabric loops can be eliminated and the thickness of the knitted fabric can be made uniform.

[0041] The single-sided plain weft plating weave is made of continuous unit coils strung in one direction, forming a weave with one side completely made of front coils and the other side completely made of back coils. The characteristics of this weave are that the fabric is light and thin, has obvious curling, has high shedding, good extensibility, and can form front and back effects with obviously different structures and gloss.

[0042] The circular knitted fabric of the present invention is a single-sided plain weft plating structure, and is composed of coils with a mutually interpenetrating structure, so that the fabric has good extensibility and elasticity and good air permeability.

[0043] The close-fitting wearing surface of the fabric of the invention is a ground yarn loop surface woven from 75D / 72F fine-denier modified polyester supercool multifilament, and the face yarn of the fabric of the invention containing wool fiber is located on the fabric surface.

[0044] Modified polyester supercool multifilament is selected as the ground yarn, and modified polyester supercool / wool fiber / modal fiber blended yarn (75 / 10 / 15) is the face yarn. Combined with the double-layer fabric structure effect of plain needle plating, the ground yarn has better moisture conduction performance and the face yarn has better moisture absorption performance. This single-sided double-layer fabric structure, supplemented by the capillary structure effect of sweat moisture being transferred from the inner layer of the fabric to the outer layer of the fabric, makes the fabric have excellent quick-drying function.

[0045] Explanation: (1) Considering the fiber raw material structure, the moisture conduction and moisture absorption properties of the ground yarn and the veil are different, that is, the ground yarn is modified polyester supercool with different cross-sections, which has good moisture conduction performance, and the veil is a blended yarn of modified polyester supercool / wool fiber / modal fiber with different cross-sections, which has better moisture absorption performance than the ground yarn;

[0046] (2) From the perspective of fabric structure, the added yarn fabric has a single-sided double-layer effect. The single-sided fabric is light and thin; the double-layer effect is that after the human body sweats, the inner layer conducts moisture and the outer layer absorbs moisture, which is beneficial for the transfer of moisture from the inner layer of the fabric to the outer layer of the fabric, so that the inner layer of the fabric surface always remains dry.

[0047] The double-sided structure of the single-sided plain weft plating structure according to the present invention makes the fabric thin and compact, and has the function of anti-ultraviolet.

[0048] Note: This is compared with single-sided fabrics. Generally, the thicker the fabric, the better the UV protection. Compared with ordinary single-sided weft knitted fabrics, the added yarn fabric is thicker, and the fabric has a tighter structural parameter (the coil length of the top yarn and the ground yarn is 15.7cm / 50 needles: 15.1cm / 50 needles), so the UV protection function is better.

[0049] The weaving, dyeing and finishing process of a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function of the present invention is as follows:

[0050] A weaving, dyeing and finishing process for a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function, characterized in that:

[0051] Grey cloth is woven on a circular knitting machine with warp and weft plain yarn addition, grey cloth → matching cylinder → dyeing → drying → opening → shaping → steaming → rolling → grey cloth fabric;

[0052] The knitted fabric grey cloth is a double-sided structure formed by double-layer interweaving of single-sided plain weft plating yarn tissue, including:

[0053] Three-component blended yarn for knitted fabric veils,

[0054] Modified polyester supercool multifilament for knitted fabric ground yarn,

[0055] The three-component blended yarn is formed by blending modified polyester supercool short fiber with wool fiber and modal fiber at a mass ratio of 70-75%, 10-15% and 10-15% respectively through a siro compact spinning process, and the three-component blended yarn is interwoven with modified polyester supercool multifilament through single-sided double-layer knitting;

[0056] The modified polyester supercool staple fiber is blended with wool and modal to form a three-component blended yarn with a fineness of 32S; the modified polyester supercool filament uses 75D / 72F fine denier multifilament;

[0057] The modified polyester supercool staple fiber and modified polyester supercool filament fiber are both grafted and copolymerized to introduce hydrophilic groups on the polymer chain, and the network formed by the interweaving of the Y-shaped cross-sectional structure of the fiber and the micropores and microgrooves on the fiber surface form wicking channels of different sizes.

[0058] According to the present invention, a weaving, dyeing and finishing process for a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function is characterized by:

[0059] Supercool fibers are grafted with hydrophilic groups on polymer chains to form wicking channels of varying sizes through the network formed by the interweaving of the Y-shaped cross-sectional structure of the fibers and the micropores and microgrooves on the fiber surface.

[0060] As a result, the specific surface area of ​​Supercool fiber is increased by more than 100% compared with ordinary polyester fiber.

[0061] According to the present invention, a weaving, dyeing and finishing process for a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function is characterized by:

[0062] The modified polyester supercool staple fiber and modified polyester supercool filament are both grafted with hydrophilic groups on the polyethylene terephthalate polymer chain. The fiber adopts a Y-shaped cross section, and micropores and microgrooves are formed on the fiber surface to form wicking channels of different sizes.

[0063] According to the present invention, a weaving, dyeing and finishing process for a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function is characterized by:

[0064] The process of one-bath dyeing polyester with two-bath dyeing is as follows:

[0065] The bath ratio is 1:10, and room temperature water is poured into the high temperature and high pressure dyeing machine cylinder, and the main pump is started, and the fabric is put into the machine for circulation;

[0066] Inject into the dyeing machine tank:

[0067] A diluted solution of acetic acid with a weight ratio of 0.3% of the fabric,

[0068] A diluted solution of high temperature leveling agent with a weight ratio of 0.6% of the fabric,

[0069] SL-376N degreasing yarn auxiliary agent with a concentration of 2g / L,

[0070] The concentration of 2g / L bath lubricant,

[0071] Wool fiber protector with a concentration of 3%, circulated for 15 minutes;

[0072] Then, a fully dissolved disperse dye solution of 0.4% by weight of the fabric is injected into the dyeing machine cylinder, and the temperature is raised from room temperature to 70°C at a heating rate of 2.0°C / min, and kept warm for 10 minutes;

[0073] The temperature was raised to 110°C at a rate of 1.5°C / min and kept at this temperature for 5 minutes;

[0074] Then, the temperature was raised to 130°C at 1.5°C / min and kept at this temperature for 30 minutes;

[0075] Cool down to 100°C at a cooling rate of 1.5°C / min;

[0076] Then, the temperature was lowered to 80°C at a rate of 2.5°C / min, and samples were taken for color comparison; after the color was confirmed, the liquid was discharged.

[0077] According to the present invention, a weaving, dyeing and finishing process for a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function is characterized by:

[0078] Another process for dyeing wool fiber and modal fiber by two-bath dyeing is as follows:

[0079] The bath ratio is 1:10. Pour room temperature water into the dyeing machine's cylinder, start the main pump, put the fabric in for circulation, and heat the water solution and fabric in the cylinder from room temperature to 40°C.

[0080] Rapidly inject into the dyeing machine cylinder a solution of 50% of the weight of the fabric, 1.5g / L acetic acid, and a pH value of 4.5-5.5;

[0081] A leveling agent of 2% by weight of the fabric is injected, and after circulating for 10 minutes, a fully dissolved wool reactive dye solution of 2.5% by weight of the fabric is injected;

[0082] After 10 minutes of cycle operation, the temperature was raised from 40°C to 60°C at a heating rate of 1.5°C / min and kept at this temperature for 60 minutes;

[0083] Take samples for color matching. If the color is qualified, overflow and wash for 10 minutes before draining.

[0084] According to the present invention, a weaving, dyeing and finishing process for a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function is characterized by:

[0085] The setting is overfeed setting, that is, the cloth feeding speed of the setting machine is greater than the speed of the setting machine, the setting temperature is 180-190° C., the setting speed is 30-40 m / min, the overfeed ratio is 1%-3%, and the setting time is 40-50 seconds.

[0086] According to the present invention, a weaving, dyeing and finishing process for a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function is characterized by:

[0087] The decatizing process uses a KD95 decatizing machine, with outside-to-inside steaming for 70-80 seconds and inside-to-outside steaming for 140-150 seconds, and a steam pressure of 0.09-0.10 MPa.

[0088] Description: (1) KD95 decatizer is a tank decatizer, which works in intermittent high pressure mode. After the fabric is sprayed and wetted, it is rolled into a closed pressure tank together with the lining cloth. The steam repeatedly passes through the fabric from inside to outside and from outside to inside in the tank, giving the fabric a more lasting shaping effect.

[0089] (2) Explanation on the different steaming times for outside-in and inside-out steaming:

[0090] The decatizing drum is made of hollow copper, through which steam can pass. There are many small holes on the surface, so steam can circulate from the inside to the outside or from the outside to the inside. During decatizing, the fabric and the lining cloth are rolled flat on the decatizing drum under a certain tension and pressure. The decatizing drum is first steamed for a certain period of time, and then the external steam is switched to allow the steam to pass through the fabric into the drum. Since the steam needs to pass through the lining cloth to the fabric when it is from the inside to the outside, the steaming time should be set longer; while when it is from the outside to the inside, it is directly transferred to the fabric, so the setting time is shorter. The final decatizing process parameters are obtained by comprehensively considering the role of the lining cloth during decatizing and the different factors of the inner and outer layer raw materials.

[0091] According to the present invention, the wool fiber protection auxiliary agent is added in the post-finishing dyeing process, and the wool fiber performance is well protected through two-bath dyeing.

[0092] According to the present invention, a decatizing process is added to the post-finishing process, and after steaming, the fabric containing wool fibers on the surface and the high-proportion modified polyester supercool fabric are stable in shape, not easy to deform, and have a soft appearance, thereby improving the wool-like effect, and making the low-proportion wool fiber fabric also show the wool fiber texture and luxurious luster.

[0093] illustrate:

[0094] (1) The most important different steps: the addition of decatizing (the principle is that the fabric is treated with steam for a period of time under tension and pressure conditions), which can give full play to the wool-like modified polyester supercool fiber and the low-proportion wool yarn with better wool luster, and the final fabric is permanently fixed (stable in size), soft and refreshing, elastic, and has a natural luster. The disadvantage is that the strength of the fabric is slightly reduced, but it is not affected because the strength is sufficient. The previous circular knitted fabric finishing process does not require decatizing.

[0095] (2) The main different processes:

[0096] (a) Dyeing process (two-bath dyeing process). Although high temperature is required for dyeing supercool, and wool is not resistant to high temperature, this process can still maintain the good feel of the fabric and the style of wool;

[0097] (b) Shaping process: According to the characteristics of the ground yarn and surface yarn raw materials, combined with the size and proportion of the ground yarn loop and the surface yarn loop during knitting and weaving, the overfeeding shaping process is determined, which can make the fabric reach the expected fabric structure parameters and easily obtain better UV protection function.

[0098] Compared with the prior art, the circular knitted fabric with moisture absorption and quick-drying composite functions suitable for spring and summer T-shirts and POLO shirts of the present invention has multiple composite functions such as moisture absorption, quick drying, antibacterial and bacteriostatic, and UV protection, and is light, soft, and breathable, retaining the luxurious and soft luster of wool fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0099] Figure 1 It is a schematic diagram of the structure of the circular knitted fabric of the present invention.

[0100] Figure 2 Schematic diagram of the cross section of modified polyester supercool fiber.

[0101] Figure 3 This is a schematic diagram of the cross-sectional structure and surface micropores of the modified polyester supercool fiber after magnification under a microscope.

[0102] In the figure, 1 is a knitted fabric face yarn, 2 is a knitted fabric ground yarn, and 3 is microporous microgrooves of varying sizes formed on the surface of modified polyester supercool fibers as wicking channels. DETAILED DESCRIPTION

[0103] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0104] The invention discloses a circular knitted fabric with a moisture absorption and quick-drying composite function. The preparation method of the circular knitted fabric comprises the following steps: selecting 90N merino wool fiber, modal fiber with a fineness of 0.89 dtex to 1.67 dtex and a length of 38 mm, and modified polyester supercool short fiber with a fineness of 1.2 dtex and a length of 38 mm, and preparing 32S wool fiber / modal fiber / modified polyester supercool blended yarn by a siro compact spinning process at a mass ratio of 10:15:75;

[0105] This blended yarn is used as the face yarn, and 75D / 72F modified polyester supercool multifilament is selected as the ground yarn. 75d / 72f means that the fineness of the multifilament is 75 denier and it is composed of 72 monofilaments. On a 30-inch, 28-gauge circular knitting machine, the warp and weft plain plating structure is prepared into a blank fabric. The single-sided weft plain plating structure is made of continuous unit coils strung in one direction, and its front and back structures are different. The front side is completely the front coil, and the back side is completely the back coil. This structure makes the fabric have better extensibility and elasticity.

[0106] The weight ratio of the face veil and the ground veil in the fabric is controlled to be 70%:30%, and the length of the face veil and the ground veil loops is 15.7cm / 50 needles and 15.1cm / 50 needles, so that the face veil loop effectively covers the ground veil loop to prevent the ground veil loop from being exposed, and the grammage per square meter of the blank fabric is 165g / m2 ;

[0107] The above-mentioned rough fabric is prepared into a smooth rough fabric through the dyeing and finishing process of rough fabric weaving → matching vats → dyeing → drying → opening width → shaping → steaming → rolling, wherein:

[0108] The dyeing process is two-bath dyeing, one-bath dyeing of modified polyester supercool, and one-bath dyeing of wool fiber and modal fiber;

[0109] A. One-bath polyester dyeing process: bath ratio 10-1:15, preferably 1:10, inject room temperature water into the high temperature and high pressure dyeing machine cylinder, start the main pump, put the fabric into the circulation operation; inject 0.3% of the weight ratio of the fabric into the cylinder of the dyeing machine. The diluted solution of acetic acid, 0.6% of the weight ratio of the fabric, the diluted solution of the high temperature leveling agent, 2g / L of SL-376N degreasing yarn auxiliary agent, 2g / L of bath smoothing agent, and 3% of wool fiber protective agent are injected into the cylinder of the dyeing machine, and the circulation operation is carried out for 15 minutes. ; Inject a fully dissolved disperse dye solution of 0.4% of the weight of the fabric into the dyeing machine cylinder, heat it from room temperature to 70°C at a heating rate of 2.0°C / min, and keep it warm for 10 minutes; heat it to 110°C at a heating rate of 1.5°C / min, and keep it warm for 5 minutes; then heat it to 130°C at a heating rate of 1.5°C / min, and keep it warm for 30 minutes; then cool it to 100°C at a cooling rate of 1.5°C / min; then cool it to 80°C at a cooling rate of 2.5°C / min to take samples for color matching; drain the liquid after the color is confirmed;

[0110] B. One-bath dyeing process for wool fiber and modal fiber: bath ratio 10-1:15, preferably 1:10, inject room temperature water into the cylinder of the dyeing machine, start the main pump, put the fabric into the cylinder for circulation, and heat the water solution and the fabric in the cylinder from room temperature to 40°C; quickly inject a solution of 50% of the weight of the fabric into the cylinder of the dyeing machine, the concentration of 1.5g / L acetic acid and the pH value of 4.5-5.5, inject a leveling agent of 2% of the weight of the fabric, and after circulating for 10 minutes, inject a fully dissolved wool active dye solution of 2.5% of the weight of the fabric; after circulating for 10 minutes, heat from 40°C to 60°C at a heating rate of 1.5°C / min, keep warm for 60 minutes, and take samples for color matching; if the color is qualified, overflow washing for 10 minutes and then drain.

[0111] Among them: the shaping is overfeed shaping, the shaping temperature is 180-190℃, the shaping speed is 30-40m / min, the overfeed is 1%-3%, and the shaping time is 40-50s;

[0112] Among them: the decatizing process uses a KD95 decatizing machine, with outside-to-inside steaming for 70-80 seconds, inside-to-outside steaming for 140-150 seconds, and a steam pressure of 0.09-0.10MPa;

[0113] The width and grammage of the finished product of the present invention are controlled according to the required width and grammage of the finished product, and the other processes are the same as the conventional process; the width of the obtained raw material fabric is 190cm, and the grammage per square meter is 220g / m 2 .

[0114] The circular knitted fabric with moisture absorption and quick-drying composite function produced by the above method is left to stand for 72 hours under standard conditions, and then the moisture absorption, quick-drying, antibacterial and anti-bacterial properties, anti-ultraviolet composite function, as well as air permeability, anti-pilling grade, dimensional change rate and other properties of the fabric are tested with reference to national and industry standards. The corresponding standards and test results are shown in Table 1.

[0115] Table 1 Fabric performance test results

[0116]

[0117]

[0118] According to the national standard GB / T21655.1-2008, the hygroscopicity of fabrics is expressed by three indicators (water absorption rate, wicking height, and drip diffusion time), and the quick-drying property is expressed by two indicators (evaporation rate and moisture permeability). All the indicators described in the present invention are higher than the national standard values, among which the moisture permeability data is particularly important. There are also references that hygroscopicity adopts the AATCC standard and quick-drying property is expressed by the evaporation rate indicator.

[0119] The above embodiments do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A thin and light circular knitted fabric with moisture absorption and quick-drying composite function, characterized in that: The knitted fabric is a double-sided structure formed by double-layer interweaving of single-sided plain weft plating yarn tissue, including: Three-component blended yarn for knitted fabric veils, Modified polyester supercool multifilament for knitted fabric ground yarn, The three-component blended yarn is formed by blending modified polyester supercool short fiber with wool fiber and modal fiber at a mass ratio of 70-75%, 10-15% and 10-15% respectively through a siro compact spinning process, and the three-component blended yarn is interwoven with modified polyester supercool multifilament through single-sided double-layer knitting; The modified polyester supercool staple fiber is blended with wool and modal to form a three-component blended yarn with a fineness of 32S; the modified polyester supercool filament is 75D / 72F fine denier multifilament.

2. A thin and light circular knitted fabric with moisture absorption and quick-drying composite function according to claim 1, characterized in that: The circular knitted fabric has a grammage per square meter of 165 g / m 2 -220g / m 2 .

3. The light and thin circular knitted fabric with moisture absorption and quick-drying composite function according to claim 1, characterized in that: The modified polyester supercool staple fiber and modified polyester supercool filament fiber are both grafted with hydrophilic groups on the polyethylene terephthalate polymer chain. The fiber adopts a Y-shaped cross-section, and the multiple micropores and microgrooves on the fiber surface form wicking channel structures of varying sizes.

4. The circular knitted fabric with moisture absorption and quick-drying composite function according to claim 1, characterized in that: The modified polyester supercool staple fiber is a modified polyester supercool staple fiber with a fineness of 1.2 dtex and a length of 38 mm; The wool fiber of the three-component blended yarn is merino wool fiber with a quality count of 17.5 microns (90N) or above, and the modal staple fiber has a fineness of 0.89 dtex to 1.67 dtex, a length of 38 mm, and a shrinkage rate of 1%.

5. The circular knitted fabric with moisture absorption and quick-drying composite function according to claim 1, characterized in that: The mass ratio of the face yarn to the ground yarn of the rough fabric is 65-70%:30-35%.

6. The circular knitted fabric with moisture absorption and quick-drying composite function according to claim 1, characterized in that: The loop lengths of the blank fabric, the face yarn and the ground yarn are 15.5-16.0 cm / 50 stitches and 14.8-15.3 cm / 50 stitches respectively.

7. A weaving, dyeing and finishing process for a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function according to any one of claims 1 to 6, characterized in that: Grey cloth is woven on a circular knitting machine with warp and weft plain yarn addition, grey cloth → matching cylinder → dyeing → drying → opening → shaping → steaming → rolling → grey cloth fabric; The knitted fabric grey cloth is a double-sided structure formed by double-layer interweaving of single-sided plain weft plating yarn tissue, including: Three-component blended yarn for knitted fabric veils, Modified polyester supercool multifilament for knitted fabric ground yarn, The three-component blended yarn is formed by blending modified polyester supercool short fiber with wool fiber and modal fiber at a mass ratio of 70-75%, 10-15% and 10-15% respectively through a siro compact spinning process, and the three-component blended yarn is interwoven with modified polyester supercool multifilament through single-sided double-layer knitting; The modified polyester supercool staple fiber is blended with wool and modal to form a three-component blended yarn with a fineness of 32S; the modified polyester supercool filament uses 75D / 72F fine denier multifilament; The modified polyester supercool staple fiber and modified polyester supercool filament fiber are both grafted and copolymerized to introduce hydrophilic groups on the polymer chain, and the network formed by the interweaving of the Y-shaped cross-sectional structure of the fiber and the micropores and microgrooves on the fiber surface form wicking channels of different sizes.

8. A weaving, dyeing and finishing process for a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function as claimed in claim 7, characterized in that: The dyeing is a two-bath dyeing method, one bath dyeing modified polyester supercool, two bath dyeing wool fiber and modal fiber, The process of one-bath dyeing polyester with two-bath dyeing is as follows: The bath ratio is 1:10, and room temperature water is poured into the high temperature and high pressure dyeing machine cylinder, and the main pump is started, and the fabric is put into the machine for circulation; Inject into the dyeing machine tank: A diluted solution of acetic acid with a weight ratio of 0.3-0.32% of the fabric, A diluted solution of high temperature leveling agent with a weight ratio of 0.6-0.62% of the fabric, SL-376N degreasing yarn auxiliary agent with a concentration of 2-2.1g / L, The concentration of the bath lubricant is 2-2.1g / L, Wool fiber protector with a concentration of 3-3.1%, circulated for 15 minutes; Then, a fully dissolved disperse dye solution with a weight ratio of 0.4-0.41% of the fabric is injected into the dyeing machine cylinder, and the temperature is raised from room temperature to 70°C at a heating rate of 2.0°C / min, and kept warm for 10 minutes; The temperature was raised to 110°C at a rate of 1.5°C / min and kept at this temperature for 5 minutes; Then, the temperature was raised to 130°C at 1.5°C / min and kept at this temperature for 30 minutes; Cool down to 100°C at a cooling rate of 1.5°C / min; Then, the temperature was lowered to 80°C at a rate of 2.5°C / min, and samples were taken for color comparison; after the color was confirmed, the liquid was discharged.

9. A weaving, dyeing and finishing process for a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function as claimed in claim 7, characterized in that: Another process for dyeing wool fiber and modal fiber by two-bath dyeing is as follows: The bath ratio is 1:

10. Pour room temperature water into the dyeing machine's cylinder, start the main pump, put the fabric in for circulation, and heat the water solution and fabric in the cylinder from room temperature to 40°C. Rapidly injecting a solution of 50-50.2% of the weight of the fabric and 1.5-1.52 g / L acetic acid into the dyeing machine cylinder and controlling the pH value to 4.5-5.5; Injecting 2-2.1% of the weight ratio of the leveling agent to the fabric, and after circulating for 10 minutes, injecting 2.5-2.6% of the weight ratio of the fabric into a fully dissolved wool active dye solution; After 10 minutes of cycle operation, the temperature was raised from 40°C to 60°C at a heating rate of 1.5°C / min and kept at this temperature for 60 minutes; Take samples for color matching. If the color is qualified, overflow and wash for 10 minutes and then drain the liquid.

10. A weaving, dyeing and finishing process for a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function as claimed in claim 7, characterized in that: The setting is overfeed setting, that is, the cloth feeding speed of the setting machine is greater than the speed of the setting machine, the setting temperature is 180-190°C, the setting speed is 30-40 m / min, the overfeed ratio is 1%-3%, and the setting time is 40-50 seconds.

11. A weaving, dyeing and finishing process for a thin and light circular knitted fabric with a moisture absorption and quick-drying composite function as claimed in claim 7, characterized in that: In the decatizing process, the steaming is performed from outside to inside for 70-80 seconds, and from inside to outside for 140-150 seconds, with a steam pressure of 0.09-0.10 MPa.

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